Feature
1.Use high quality chip LM2596, high precision(Max 92%), low
calorific value
2.Use the original low ESR Sanyo filter capacitor which can make
the ripple voltage as low as 50mV
3.Use machines to finish the SMD, reflow soldering. What’s more,
all of those items have passed 2 hours burn-in test to make sure
the stability before shipment.
Application
1.Charging for lithium battery: When the battery is under low
voltage, it will be burned if we charge it with constant voltage.
So we should charge it with constant current.
2.Driver high power LED: The power of one LED is limited, when we
need higher brightness, we can use this module to achieve constant
current drive for multiple LEDs.
3.Any other occasions which need constant current input.
Electric parameter
Output voltage: 7~35V
Input voltage: 1.25~30V
Output current: Max 3A
Transfer efficiency: 92%(Max)
Switching frequency: 150KHz
Product size: 48mm(L)*23mm(W)*14mm(H)
Note
It is a adjustable step down power module, we can change the output
voltage by adjusting the blue adjustable resistor. The input/output
voltage difference value is 2V, the Min output voltage is 1.23V.
Make sure the following pin connection are right, the wrong connect
will bring damage to this module
"IN-" stands for input cathode
"IN+" stands for input anode
"OUT-" stands for output cathode
"OUT+" stands for output anode
How to charge the battery
1. We should know the float voltage and charging current of the
battery which needed to be charged, we also should know the input
voltage of this module.
2. Adjust the Constant potentiometer until the output voltage is
about 5V.
3.Use the 10A current function of the multimeter to test the input
short-circuit current, adjust the constant-current potentiometer
until the input current reaches the proper charging current.
4. Turn lamp current is default as 0.1 times of the charging
current ( constant value ) .
5. Adjust the constant-voltage potentimeter until the output
voltage reaches the float voltage ;
6. Connect it with the battery and test the charging.
(For the 1,2,3,4,5 step, connect the input port of this module to
the power supply and do not connect the output port with battery).
LED constant-current driver
1. Make sure the operating current and maximum operating voltage of
the LED driver
2. Adjust the constant-voltage potentiometer until the output
voltage is about 5V
3. Use the 10A current function of the multimeter to test the input
short-circuit current, adjust the constant-current potentiometer
until the input current reaches the working current of the LED
4. Adjust the constant-voltage potentimeter until the output
voltage reaches the MAX working voltage of the LED
5. Connect the LED, test it
(For the 1,2,3,4 t steps. Just connect the input port of this
module to the power supply, do not connect the output port with the
LED.)
Battery Charging method:
1. Make sure the recharge battery float voltage and charge current,
input voltage of the module
2. Adjust constant voltage regulator, the output voltage about 5V
3. With a multimeter ( to 10A) Measuring output Short-circuit
current, Also adjust the constant regulator allows Output current
reaches a predetermined charge current value
4. Adjust Constant regulator allows Output voltage reaches the
float voltage
5. Connected to the battery, try to charge
(1,2,3,4 step input connect power, output do not connect battery.)
LED constant curren